Make a battery of mini-launchers designed to fling small objects safely. All you need are everyday items and some adult help. Then take aim and launch! Make several and use them on your own medieval battlefield. Bite-sized facts explain how these small launchers have been used through history too!
语言 英语 ● 格式 EPUB ● ISBN 9781512420265 ● 出版者 Lerner Publishing Group ● 发布时间 2016 ● 下载 3 时 ● 货币 EUR ● ID 5043809 ● 复制保护 Adobe DRM
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